ClickHouse/src/Dictionaries/DictionaryBlockInputStreamBase.h
2020-04-03 18:14:31 +03:00

25 lines
472 B
C++

#pragma once
#include <DataStreams/IBlockInputStream.h>
namespace DB
{
class DictionaryBlockInputStreamBase : public IBlockInputStream
{
protected:
DictionaryBlockInputStreamBase(size_t rows_count_, size_t max_block_size_);
virtual Block getBlock(size_t start, size_t length) const = 0;
Block getHeader() const override;
private:
const size_t rows_count;
const size_t max_block_size;
size_t next_row = 0;
Block readImpl() override;
};
}